Lucent Technologies DEFINITY Installation For Adjuncts And Peripherals page 138

DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals 555-233-116
9 DS1/T1 CPE Loopback Jack
Loopback Testing with a Smart Jack
Checking the integrity of local equipment
Before you go any further, make sure that the the problem is actually on the DS1
span by testing the equipment that connects to the span at the near end.
1. Test the DS1 circuit pack, and perform any needed maintenance or
repairs.
2. Test the ICSU, and perform any needed maintenance or repairs.
Busying out the DS1 circuit pack
Now take the DS1 circuit out of service.
1. Once you are sure that the DS1 circuit pack and ICSU are functioning
correctly, go to the management terminal, and busy out the DS1 circuit
pack by entering
busyout board UUCSS
where UU is the cabinet number, C is the carrier number, and SS is the
slot number of the DS1 board.
Administering the DS1 for the test
1. At the management terminal, open the DS1 administration form. Enter
change DS1 UUCSS
where UU is the cabinet number, C is the carrier number, and SS is the
slot number of the DS1 board.
2. Make sure that the near-end csu type field is set to integrated.
3. Change to page 2 of the DS1 administration form, and confirm that the
value of the TX LBO field is 0dB.
4. If the value of the TX LBO field is not 0dB, record the current value. Then
set the TX LBO field to 0dB for testing.
5. Press
Testing the integrity of the loopback circuit
Now perform the first part of the actual loopback test.
1. At the management terminal, enter
test DS1-loop UUCSS cpe-loopback-jack
where UU is the cabinet number, C is the carrier number, and SS is the
slot number of the DS1 board.
The loopback jack powers up. Active, DS1 facility alarms (if any) clear.
After about 20 seconds, the first set of results appears on the terminal.
to make the changes,
ENTER
to quit without changes.
CANCEL
Issue 1
April 2000
116